In a lot of ways, being in a team of managers is just like being in a team of non-managers. In each case, you still have a role to play and you will need to make a fair contribution to the team. If this team of managers is a high performing team, then it will certainly be more than the sum of its parts.
Team contribution is achieved through collaboration, and collaboration is a catch-all term to describe effective interactions that accomplish a shared goal. It's useful to imagine collaboration as a network graph with a bunch of spider webs interconnected among a number of other spider webs.